including © notice, is given to the source. Deals Not Done: Sources of Failure in the Market for Ideas

for facilitating this research. We gratefully acknowledge funding from SSHRC, the Martin Prosperity Institute, and the Centre for Innovation and Entrepreneurship at the University of Toronto. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research. NBER working papers are circulated for discussion and comment purposes. They have not been peer-reviewed or been subject to the review by the NBER Board of Directors that accompanies official NBER publications